Collet Chuck

[Jimsehr]

One thing a 5c collet system can do is take Hardinge or Rovi internel collets where you can hold on the id of a part. Also you can use the 5c system to hold over size step collets where you can bore them up to as large as 6 inches to hold short pieces. Another thing you can buy 5c square and hex collets . Plus you can use 5c emergency
collets where you can bore off center to turn parts to get a cam effect. Or bore them to hold short special shapes. And you can get dead length collets to hold the lengths right on. I have done all of the above.

jimsehr

 

[Mid Day Machining]

Good day/

I am looking at doing the same for my lathe... as part of my research....ER collets came up as possible a better option (full grip of the material over the entire length of the collet vice the 5C, which by design, clamps from the open end of the slit at full power and less contact as the collet/ material contact moves toward the rear.)

So, if I may, why are you choosing 5C collet system vice ER collets?

Thanks

Erik

ER collets are good, but with 5C collets you can get shapes. You can get squares, rectangles or hexes from Hardinge. All you get with ER collets is round. And with ER collets, there's no way to set a stop if you want to do production work.

Hardinge collets are pricey, but they run dead nuts. Ooooh, that sounds painful.

 

[kd4gij]

ER collets are good, but with 5C collets you can get shapes. You can get squares, rectangles or hexes from Hardinge. All you get with ER collets is round. And with ER collets, there's no way to set a stop if you want to do production work.

Hardinge collets are pricey, but they run dead nuts. Ooooh, that sounds painful.

This isn't true. I use stops with er collets all the time. Thay just mount in the ficture insted of in the collet. 5ccollets are more versital in some aspect put thay are not suted for tool holding. ER collets are great for tool holding. It all depinds on what your needs are as to witch you use. I have bouth.

 

[Bill Gruby]

ER collets are good, but with 5C collets you can get shapes. You can get squares, rectangles or hexes from Hardinge. All you get with ER collets is round. And with ER collets, there's no way to set a stop if you want to do production work.

Hardinge collets are pricey, but they run dead nuts. Ooooh, that sounds painful.

Please explain how you came to the conclusion that you cannot have a stop for a production run with ER collets. I have one for my ER 40s. It's the same one I use for my other chucks. It has interchangeable ends of varying diameters and lengths.

"Billy G"